Learn the Issues
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2021 Emissions Modeling Platform Technical Support Document
This document describes how the emission inventories were prepared for air quality modeling by the U.S. Environmental Protection Agency (EPA) for criteria air pollutants to represent the year of 2020.
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Soak Up the Rain: Permeable Pavement
Learn how permeable pavements work to help soak up the rain and reduce runoff. Find information on how to select, install and maintain permeable pavement surfaces.
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Particle Pollution Designations Regulatory Actions
chronological listing of all regulatory actions related to designations for the 2012 fine particle standard
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Outer Continental Shelf Air Permits
Provides information and links to EPA's Outer Continental Shelf air permitting requirements.
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EPA Issues Guidance on Streamlining Clean Air Act Title V Operating Permit Process to Expedite Approvals
EPA issued guidance clarifying the agency’s review process of Clean Air Act (CAA) title V permits to streamline and expedite approvals.
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Environmental Crime Victim Resources - Puerto Rico
A resource listing for environmental crime victims
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Environmental Crime Victim Resources - Pacific Islands
A resource listing for environmental crime victims
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Air Permit Delegation and PSD SIP Approval Status in EPA's Pacific Southwest (Region 9)
Federal air regulations that have been delegated to state or local air pollution control agencies in EPA's Pacific Southwest, Region 9.
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Final Amendments to Delegation of Authority Provisions in the Prevention of Significant Deterioration Permitting Program
finalized amendments to the New Source Review (NSR) Prevention of Significant Deterioration (PSD) permitting program that will allow the EPA to delegate administration of the program to interested and qualified tribal agencies.
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Final Amendments to the Federal Indian Country Minor New Source Review Rule
Review of New Sources and Modifications in Indian Country - Amendments to the Federal Indian Country Minor New Source Review Rule
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EPA Community Grants - Funding
EPA Community Grants
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What RFG parameters should parties monitor as part of their downstream quality assurance programs?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Parties should monitor the applicable downstream standards as part of their downstream quality assurance programs under § 80.79(c). These are: under the simple model, oxygen and benzene, and RVP in the case of VOC-controlled RFG; and under the complex…
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What volume of gasoline should a sample collected by an independent lab contain?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. EPA believes that a one quart sample is adequate. (7/1/94) This question and answer was posted at
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What would the wholesaler put on his PTDs when he transfers title to another party?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Section 80.1153 describes the requirements for PTDs, which generally include the name and address of the transferor and transferee, the company registration number of each, the volume of renewable fuel being transferred, the date of the transfer, and information…
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Will EPA consider exempting Guam or the Northern Mariana Islands from the RFG/Anti-dumping regulations pursuant to § 325(a)(1) of the Clean Air Act, subject to a request from the Governor of these territories?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Section 325(a)(1) of the Clean Air Act (Act) provides that, upon petition by the Governor of Guam, American Samoa, the Virgin Islands, or the Commonwealth of the Northern Mariana Islands, the Administrator of EPA may exempt any person or…
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Will EPA cooperate in round robin efforts to provide correlation tests for users of method ASTM D-1319-93 for total aromatics?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. EPA will participate as we are able. Since we are unable to make open commitments of this type, labs should make arrangements with local labs for routine correlation testing. (7/1/94) This question and answer was posted at
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Will EPA consider widening the limits on distillation?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The range of data on which the Complex Model was based limits the range within which the model will exhibit appropriate accuracy. The E200 range in the database was 33 to 66 vol%; extrapolation widened this range to 30…
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Will the EPA "Spreadsheet" be revised to be considered acceptable for fuel certifications?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. No. The spreadsheet was designed to provide assistance in understanding and implementing the Complex Model equations as provided in the regulations. The EPA has no authority to endorse the spreadsheet as a legal instrument of certification. Only the Federal…
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How will EDI agreements affect third parties?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. An EDI agreement will be binding only on the Agency and the cosigner of the agreement. (7/1/94) This question and answer was posted at
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How will EPA enforce their regulations in California? Will the Agency defer to the California Air Resources Board?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Prior to the start of the California Phase II RFG program in March 1996, EPA generally will enforce the federal RFG program California in the same manner in which it will be enforced in other parts of the nation…